Torque question
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
And that was my question why does the before rise but the after drops so fast. I know L98 develope torque down low better than LT1 s but I never realized how much they drop off at higher rpms. Is that a function of air intake?
Team Owner
Joined: Sep 2001
Posts: 62,140
Likes: 1,729
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Their length also holds back the engine, as the engine cant breathe at high rpms because of it.
Racer
Joined: Feb 2006
Posts: 460
Likes: 0
From: MN
With the difference in Dyno's I would say you have the advantage in higher peek numbers. It does look like my car holds at peek for bit longer and HP curve ramps up a little quicker.
My, not so scientific HP and TQ comparison is to add the peek of the two numbers and divide by two. That puts both of us around 350 average. It's not a perfect calculation but it makes it easy to explain why a stock LS1 can not keep up with me in the 1/4.
Thread Starter
Burning Brakes
Joined: Apr 2005
Posts: 1,110
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From: JUPITER FLORIDA
I run 13.0 13.1 all day on any kind of air or track conditions, with the best of 12.85
With the difference in Dyno's I would say you have the advantage in higher peek numbers. It does look like my car holds at peek for bit longer and HP curve ramps up a little quicker.
My, not so scientific HP and TQ comparison is to add the peek of the two numbers and divide by two. That puts both of us around 350 average. It's not a perfect calculation but it makes it easy to explain why a stock LS1 can not keep up with me in the 1/4.
With the difference in Dyno's I would say you have the advantage in higher peek numbers. It does look like my car holds at peek for bit longer and HP curve ramps up a little quicker.
My, not so scientific HP and TQ comparison is to add the peek of the two numbers and divide by two. That puts both of us around 350 average. It's not a perfect calculation but it makes it easy to explain why a stock LS1 can not keep up with me in the 1/4.
Last edited by cplonner; Aug 24, 2008 at 09:10 AM.
Le Mans Master
Joined: Apr 2005
Posts: 6,413
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From: The Old Dominion
To the OP, if you took two identical cars. Imagine one has the normal LT1 torque/power curve. But the other one, you took the torque at 2000 rpm, and dragged it up about 60 lb-ft, so the torque curves from say 1500-2500 were different, but the same everywhere else.
Yes that car would be a little bit faster, all else equal. In that RPM range, it would accelerate harder than the "standard" car. Though you'd only see that advantage once in first gear, as you never drop rpms back that low after a shift.
When you are talking real-world, power > torque.
